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common.c
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common.c
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// (c) 2020 shdown
// This code is licensed under MIT license (see LICENSE.MIT for details)
#include "common.h"
void *uu_xcalloc(size_t n, size_t m)
{
void *p = calloc(n, m);
if (UU_UNLIKELY(!p && n && m))
UU_PANIC_OOM();
return p;
}
void *uu_xrealloc(void *p, size_t n, size_t m)
{
size_t sz;
if (UU_UNLIKELY(__builtin_mul_overflow(n, m, &sz)))
UU_PANIC_OOM();
void *r = realloc(p, sz);
if (UU_UNLIKELY(!r && sz))
UU_PANIC_OOM();
return r;
}
void *uu_x2realloc(void *p, size_t *n, size_t m)
{
if (*n) {
if (UU_UNLIKELY(__builtin_mul_overflow(*n, 2u, n)))
UU_PANIC_OOM();
} else {
*n = 1;
}
return uu_xrealloc(p, *n, m);
}
void *uu_xmemdup(const void *p, size_t n)
{
void *r = uu_xmalloc(n, 1);
if (n)
memcpy(r, p, n);
return r;
}
char *uu_xstrdup(const char *s)
{
return uu_xmemdup(s, strlen(s) + 1);
}
char *uu_xstrvf(const char *fmt, va_list vl)
{
va_list vl2;
va_copy(vl2, vl);
int n = vsnprintf(NULL, 0, fmt, vl);
if (UU_UNLIKELY(n < 0))
goto fail;
size_t nr = ((size_t) n) + 1;
char *r = uu_xmalloc(nr, 1);
if (UU_UNLIKELY(vsnprintf(r, nr, fmt, vl2) < 0))
goto fail;
va_end(vl2);
return r;
fail:
UU_PANIC("vsnprintf() failed");
}
char *uu_xstrf(const char *fmt, ...)
{
va_list vl;
va_start(vl, fmt);
char *r = uu_xstrvf(fmt, vl);
va_end(vl);
return r;
}